CN216198134U - Waterproof novel subway station is led to full row of half package - Google Patents
Waterproof novel subway station is led to full row of half package Download PDFInfo
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- CN216198134U CN216198134U CN202122542485.5U CN202122542485U CN216198134U CN 216198134 U CN216198134 U CN 216198134U CN 202122542485 U CN202122542485 U CN 202122542485U CN 216198134 U CN216198134 U CN 216198134U
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Abstract
The utility model relates to a novel semi-enclosed full-drainage waterproof subway station, which comprises: the subway station adjusts the traditional composite lining of the arch wall into the structural form of an anchor rod support layer, a sprayed waterproof film layer and a double-layer concrete spraying layer on the basis of fully utilizing the bearing capacity of surrounding rocks, only a beam, plate and column bearing system with simple force transmission is arranged inside the subway station, so that the lining thickness can be reduced, the material cost can be saved, the construction organization can be simplified, the construction speed can be accelerated, the traditional waterproof weak nodes such as secondary lining construction joints and deformation joints can be cancelled, and flood control and rectification are not needed during operation; meanwhile, the subway station is provided with a half-package full drainage and waterproof system consisting of a capillary drainage plate strip, a sprayed waterproof film layer, a longitudinal drainage blind pipe, a drainage side ditch, a plurality of transverse drainage pipes, a plurality of longitudinal drainage pipes and a transverse drainage pipe, so that the lining of the subway station can be prevented from being threatened by the underground water pressure, and the waterproof effect and the drainage capacity of the subway station can be improved in all directions.
Description
Technical Field
The utility model relates to the field of subway engineering design and construction, in particular to a novel waterproof subway station with a half-package and full-drainage structure and a construction method.
Background
At present, urban subway engineering structures mostly adopt 'composite lining' as a main structure and comprise primary supports, waterproof boards and secondary linings, wherein the primary supports are used as temporary structures without durability requirements and are used for only maintaining the stability of tunnel structures during construction, water and soil pressure during operation is all permanently borne by cast-in-place secondary linings with better durability, in order to relieve the corrosion effect of underground water on the secondary linings, the primary supports are usually closely adhered to and paved with fully-wrapped flexible waterproof boards which are closed into rings so as to prevent the underground water from entering the back of the secondary linings, and the secondary linings are generally large in design thickness and high in steel content so as to resist external water pressure water head load; on the other hand, various construction joints and deformation joints formed during secondary lining formwork construction become important waterproof weak parts in later period, the phenomenon of 'ten-prevention and nine-leakage' in subway operation period is not rare, the hidden danger of water leakage in later period is difficult to correct, and operation is even needed to be interrupted in serious cases.
Because the periphery of the subway tunnel is wrapped by geological surrounding rocks, the surrounding rocks are both a supporting structure and a load source, when the engineering surrounding rocks have high strength and good integrity and are poor in underground water, particularly subway engineering built in hard rock strata in Qingdao, Dalian, Chongqing and other areas is taken as a typical representative, the traditional composite lining is still adopted, so that the defects of engineering material waste, complex construction organization, reduced mechanized operation degree and the like exist, the engineering supporting cost is generally high, and the construction period is generally long; aiming at the hard rock stratum, the underground structure design should be considered in a 'perpetual and temporary' integrated manner, and a 'new Olympic method' construction idea is always implemented, namely, the self bearing capacity of the surrounding rock is fully exerted and utilized, a supporting structure constructed by artificial materials is properly weakened, and meanwhile, a reasonable underground water drainage system is arranged to relieve or even eliminate the threat of external water pressure to the secondary lining.
SUMMERY OF THE UTILITY MODEL
In order to fully utilize the self-bearing capacity of hard surrounding rock and eliminate the water pressure load borne by the lining of the subway station, the utility model provides a novel semi-wrapped and fully-lined waterproof subway station and a construction method.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a novel semi-wrapped full-drainage waterproof subway station comprises a station arch wall lining, a station bottom plate and drainage side ditches arranged on two sides of the station bottom plate; wherein:
the station arch wall lining is composed of an anchor rod support layer, a capillary drainage plate strip, a first concrete spraying layer, a spraying waterproof film layer and a second concrete spraying layer which are sequentially arranged; wherein: the capillary drainage plate strip is respectively closely attached to the tunnel surrounding rock and the first concrete spraying layer, and the spraying waterproof film layer is respectively closely attached to the first concrete spraying layer and the second concrete spraying layer; the capillary drainage plate belts are arranged at equal intervals along the length direction of the station, the tail ends of two sides of the capillary drainage plate belts are respectively connected with longitudinal drainage blind pipes arranged at the bottoms of side walls at two sides of the subway station, and the two longitudinal drainage blind pipes are both embedded in the first concrete spraying layer and are respectively communicated with a drainage side ditch through a plurality of transverse drain pipes penetrating through the sprayed waterproof thin film layer and the second concrete spraying layer;
a cushion layer is arranged below the station bottom plate, a plurality of drainage longitudinal pipes and a plurality of drainage transverse pipes are embedded in the cushion layer, the drainage transverse pipes are arranged in parallel at equal intervals along the length direction of the station, and the tail ends of the two sides of each drainage transverse pipe are respectively communicated with drainage side ditches arranged on the two sides of the station bottom plate; the plurality of the vertical drainage pipes are respectively and vertically arranged with the horizontal drainage pipes and are communicated with each other.
In the scheme, the width of the capillary drainage plate strip is 0.5-0.8m, and one capillary drainage plate strip is longitudinally arranged at intervals of 6-8m along the length direction of a station.
Further, the anchor rod support layer is composed of an arch system long anchor rod, an arch system short anchor rod and a side wall local anchor rod which are arranged inside the tunnel surrounding rock; the length of the long anchor rod of the arch system is 6m, and the length of the short anchor rod of the arch system is 4 m; the uplift resistance of the long anchor rod of the arch system and the uplift resistance of the short anchor rod of the arch system both need to meet the requirement of 100kN of installation load of an escalator and a barrier-free elevator in a station so as to replace the function of a traditional cast-in-place secondary lining arch pre-embedded lifting hook; the long anchor rods of the arch system and the short anchor rods of the arch system are arranged in a plum blossom shape of 2.0m multiplied by 2.0 m.
Further, the first concrete spraying layer adopts synthetic fiber sprayed concrete with the thickness of 150-.
Further, the thickness of the sprayed waterproof film layer is 6-10mm, the anti-permeability grade is not lower than P12, and the bonding strength between the sprayed waterproof film layer and the first concrete spraying layer and the bonding strength between the sprayed waterproof film layer and the second concrete spraying layer are not lower than 0.8 MPa.
Preferably, a load-bearing system which is simple in force transmission and comprises a beam, a plate and a column is arranged in the subway station, the load-bearing system comprises a middle plate, a middle beam, two boundary beams, a plurality of middle columns and a plurality of boundary columns, independent foundations are respectively arranged at the bottoms of the middle columns, and the tops of the middle columns are connected with the middle beam; the bottom parts of the side posts are respectively inserted into the drainage side ditch low side walls close to one side of the station side wall, and the top parts of the side posts are respectively connected with the side beams; the middle beam and the two side beams are located on the same horizontal plane and jointly support the middle plate through the middle columns and the side columns, a subway station hall layer is arranged above the middle plate, and a subway station platform layer is arranged below the middle plate.
The utility model also provides a method for constructing the half-package full-drainage waterproof novel subway station, which comprises the following construction steps:
s1, excavating rock masses in blocks and layers according to a design method, and constructing corresponding anchor rod supports in sequence;
s2, after excavation of each circulating rock mass and anchor rod supporting are completed, immediately closely attaching surrounding rock, laying a capillary drainage plate strip, timely applying a first concrete injection layer to seal the surrounding rock, forming an early surrounding rock pressure bearing structure, and simultaneously embedding a longitudinal blind pipe and a transverse drain pipe at a proper elevation position at the bottom of a side wall;
s3, cleaning and leveling the base surface of the first layer of concrete spraying layer, and spraying waterproof film layers 15m behind the face surfaces of the rock masses;
s4, constructing a second concrete spraying layer following the spraying of the waterproof film layer, forming an integral composite structure with the first concrete spraying layer, and bearing the long-term surrounding rock pressure together with the first concrete spraying layer;
s5, cleaning the bottom, leveling, laying a cushion layer and pre-burying a horizontal drainage pipe and a vertical drainage pipe;
s6, sequentially molding a lower independent foundation of the column, a bottom plate, a drainage side ditch, a side column, a middle plate, a middle beam and a side beam from bottom to top;
and S7, constructing the residual internal structure, and finishing the whole civil construction.
Compared with the prior art, the utility model has the following advantages and effects:
1. on the basis of fully utilizing the bearing capacity of surrounding rocks, the subway station adjusts the traditional composite lining structure of the arch wall into the structural form of an anchor rod support layer, a waterproof film spraying layer and a double-layer concrete spraying layer.
2. According to the subway station, the capillary drainage plate strips which are arranged at equal intervals along the longitudinal direction of the tunnel are arranged on the outer side of the first concrete spraying layer, and the longitudinal drainage blind pipes and the transverse drainage pipes which are arranged at the bottoms of the side walls at two sides of the station are combined, so that surrounding rock fracture water behind the anchor spraying lining can be drained to the drainage side ditch, and the water pressure behind the arch wall lining is completely eliminated; a spraying waterproof film layer is arranged between the first concrete spraying layer and the second concrete spraying layer, so that underground water can be effectively prevented from entering the interior of the station main body; underground water below a station bottom plate is drained to a drainage side ditch by embedding a longitudinal drainage pipe and a transverse drainage pipe in a subway station cushion layer; in conclusion, the semi-package full drainage waterproof system consisting of the capillary drainage plate strips, the longitudinal drainage blind pipes, the transverse drain pipes, the drainage side ditches, the sprayed waterproof film layers, the drainage longitudinal pipes and the drainage transverse pipes can improve the waterproof effect and the drainage capacity of the subway station in all directions.
3. The subway station is internally provided with a beam, plate and column bearing system with simple force transmission, the bearing system is a semi-closed frame structure consisting of a middle plate, a middle beam, two side beams, a plurality of middle columns and a plurality of side columns, the structure stress is more definite, reliable and safe, a station hall layer is arranged above the middle plate, a station platform layer is arranged below the middle plate, the arrangement of cast-in-place secondary lining of an arch wall is cancelled, the building arrangement pattern is more reasonable, and the underground space utilization rate is higher.
4. The subway station is particularly suitable for being built in hard surrounding rocks.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a novel semi-enclosed fully-lined waterproof subway station according to an embodiment of the present invention.
Fig. 2 is a plan view of a station hall layer of a novel semi-enclosed fully-lined waterproof subway station according to an embodiment of the present invention.
Fig. 3 is a top view of a novel semi-enclosed fully-lined waterproof subway station platform layer according to an embodiment of the present invention.
Description of reference numerals: 1. short anchor rods of the arch system; 2. arch system long anchor rods; 3. a capillary drain strip; 4. a first concrete sprayed layer; 5. spraying a waterproof film layer; 6. a second concrete spray layer; 7. local anchor rods of the side wall; 8. a middle plate; 9. a middle beam; 10. a boundary beam; 11. side columns; 12. a center pillar; 13. an independent foundation; 14. a drainage side ditch; 15. a base plate; 16. a cushion layer; 17. a longitudinal drainage blind pipe; 18. a transverse drain pipe; 19. a horizontal drainage pipe; 20. a vertical drainage pipe.
Detailed Description
The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.
Example 1: as shown in fig. 1 to 3, a novel semi-wrapped full-drainage waterproof subway station comprises a station arch wall lining, a station bottom plate 15 and drainage side ditches 14 arranged on two sides of the station bottom plate; wherein:
as shown in fig. 1, the station arch wall lining is composed of an anchor rod support layer, a capillary drainage plate strip 3, a first concrete injection layer 4, a spraying waterproof film layer 5 and a second concrete injection layer 6 which are sequentially arranged; wherein: the capillary drainage plate strip 3 is respectively closely attached to the tunnel surrounding rock and the first concrete spraying layer 4, and the spraying waterproof film layer 5 is respectively closely attached to the first concrete spraying layer 4 and the second concrete spraying layer 6; a plurality of capillary drain strips 3 are annularly arranged along the length direction of the station at equal intervals, the tail ends of two sides of each capillary drain strip 3 are respectively connected with longitudinal drain blind pipes 17 arranged at the bottoms of side walls at two sides of the subway station, and the two longitudinal drain blind pipes 17 are both embedded in the first concrete spraying layer 4 and are respectively communicated with the drain side ditch 14 through a plurality of transverse drain pipes 18 penetrating through the waterproof spraying film layer 5 and the second concrete spraying layer 6;
as shown in fig. 1, 2 and 3, a cushion layer 16 is arranged below the station bottom plate 15, a plurality of longitudinal drainage pipes 20 and a plurality of transverse drainage pipes 19 are embedded in the cushion layer 16, the plurality of transverse drainage pipes 19 are arranged in parallel at equal intervals along the length direction of the station, and the tail ends of the two sides of each transverse drainage pipe 19 are respectively communicated with the drainage side ditches 14 arranged on the two sides of the station bottom plate 15; the plurality of vertical drainage pipes 20 are respectively vertically arranged with the horizontal drainage pipes 19 and are communicated with the horizontal drainage pipes.
In the subway station described in this embodiment 1, an anchor spray lining composed of an anchor support layer, a capillary drainage plate strip 3, a first concrete spray layer 4, a spray waterproof film layer 5 and a second concrete spray layer 6 is adopted to replace a composite lining in a traditional subway station structure, so that the overall thickness and steel content of a station arch wall lining are effectively reduced, and the material cost is saved; meanwhile, the risk that potential waterproof weak nodes such as construction joints, deformation joints and the like commonly existing in the traditional composite lining induce water leakage is avoided.
On the other hand, the subway station anchor spraying lining in the embodiment 1 is also provided with a capillary drainage plate strip 3 and a spraying waterproof film layer 5, so that the water pressure behind the arch wall lining can be completely eliminated, and underground water can be effectively prevented from entering the interior of the station main body; the subway station of the half-package full-drainage waterproof system, which is composed of the capillary drain plate strips 3, the longitudinal drainage blind pipes 17, the transverse drain pipes 18, the drainage side ditches 14, the spraying waterproof film layer 5, the drainage longitudinal pipes 20 and the drainage transverse pipes 19, has the characteristics of strong drainage capability and good waterproof effect.
Example 2: as shown in fig. 1 to 3, a novel semi-enclosed, fully-lined and waterproof subway station is different from embodiment 1 in that a beam, plate and column bearing system with simple force transmission is arranged inside a subway station main body, the beam, plate and column bearing system comprises a middle plate 8, a middle beam 9, two side beams 10, a plurality of middle columns 12 and a plurality of side columns 11, the bottoms of the middle columns 12 are respectively provided with an independent foundation 13, and the tops of the middle columns 12 are connected with the middle beam 9; the bottoms of the side columns 11 are respectively inserted into the low side walls of the drainage side ditch 14 close to one side of the station side wall, and the tops of the side columns are respectively connected with the side beams 10; the middle beam 9 and the two side beams 10 are located on the same horizontal plane and support the middle plate 8 together with the middle columns 12 and the side columns 11, a subway station hall layer is arranged above the middle plate 8, and a subway station platform layer is arranged below the middle plate 8.
In the subway station described in this embodiment 2, the thickness of the middle plate 8 is 400mm, the height × width of the cross section of the middle beam 9 is 1000mm × 900mm, the height × width of the cross section of the side beam 10 is 1000mm × 500mm, the length × width of the cross section of the center pillar 12 is 700mm × 600mm @ longitudinal distance 9.0m, and the length × width of the cross section of the side pillar 11 is 500mm × 400mm @ longitudinal distance 6.0 m; the bottom plate 15, the independent foundation 13 and the drainage side ditch 14 steel bars are not mutually anchored, and a plain concrete contact construction joint exists; the two ends of the middle plate 8 are in close contact with a side wall lining structure, 50mm deformation safety allowance is reserved between the side column 11 and the side wall lining, and the independent foundation 13 is directly placed on the stable rock foundation.
Further, in the subway station according to embodiment 1 and embodiment 2, the anchor rod supporting layer is composed of an arch system long anchor rod 2, an arch system short anchor rod 1 and a side wall local anchor rod 7 which are arranged inside the tunnel surrounding rock; the length of the arch system long anchor rod 2 is 6m, and the length of the arch system short anchor rod is 4 m; the uplift resistance of the arch system long anchor rod 2 and the arch system short anchor rod 1 both need to meet the requirement of 100kN of installation load of an escalator and an accessible elevator in a station so as to replace the function of a traditional cast-in-place secondary lining arch pre-embedded lifting hook; the arch system long anchor rod 2 and the arch system short anchor rod 1 are arranged in a 2.0m multiplied by 2.0m plum blossom shape, so that the bearing capacity of surrounding rocks at different depths can be fully adjusted; the side wall local anchor rods are only arranged when the surrounding rock is exposed to be broken. The specification of the anchor rod is selected to be a hollow grouting anchor rod with the diameter of 25 mm.
Furthermore, the width of the capillary drainage plate strip 3 is 0.5-0.8m, and one capillary drainage plate strip is longitudinally arranged at intervals of 6-8m along the length direction of the station; the first concrete spraying layer 4 is made of synthetic fiber sprayed concrete with the thickness of 150mm and mainly serves as an early surrounding rock pressure bearing structure, and the second concrete spraying layer 6 is made of high-temperature-resistant synthetic fiber sprayed concrete with the thickness of 100mm and has double functions of long-term bearing and isolation protection; the thickness of the spraying waterproof film layer 5 is set to be 8mm, the anti-permeability grade P12 is set, the bonding strength between the spraying waterproof film layer and the first concrete spraying layer 4 and the bonding strength between the spraying waterproof film layer and the second concrete spraying layer 6 are not lower than 0.8MPa, the bonding strength between the spraying waterproof film layer and the surrounding rock is not lower than 1.0MPa, deformation complete coupling between the surrounding rock and the first concrete spraying layer 4 and between the spraying waterproof film layer and the second concrete spraying layer 6 is guaranteed, and radial separation does not occur.
Further, in the subway station described in embodiment 2, the longitudinal drainage blind pipes 17 are arranged in a "flat slope" manner and longitudinally extending, the transverse drainage pipes 18 are in a 2% "one-way slope" manner and longitudinally staggered and spaced from the side pillars 11, the transverse drainage pipes 19 are in a 1% "herringbone slope" manner and staggered and spaced from the center pillars 12, the longitudinal drainage pipes 20 are arranged in a flat slope manner at equal intervals below the bottom plate 16 for 2, and the transverse drainage pipes 19 and the longitudinal drainage pipes 20 are both DN100mm double-wall corrugated pipes and are arranged in a crisscross manner and connected by four-way joints.
Example 3: as shown in fig. 1 to 3, a construction method of a half-pack full-drainage waterproof novel subway station according to construction embodiment 2 includes the following construction steps:
s1, excavating rock masses in blocks and layers according to a design method, and constructing corresponding anchor supports of an arch part and a side wall in sequence;
s2, after each circulation rock mass excavation and anchor bolt supporting are completed, immediately closely attaching surrounding rock, paving a capillary drainage plate strip 3, timely applying a first concrete injection layer 4 to seal the surrounding rock to form an early surrounding rock pressure bearing structure, simultaneously embedding a longitudinal drainage blind pipe 17 and a transverse drainage pipe 18 at a proper elevation position at the bottom of a side wall, wherein the transverse drainage pipe 18 is protected by adopting reliable measures to prevent a pipe orifice from being blocked when a second concrete injection layer 6 is applied;
s3, cleaning and leveling the base surface of the first concrete spraying layer 4, and performing construction of spraying the waterproof film layer 5 after lagging 15m of the face surface of each rock body;
s4, constructing a second concrete spraying layer 6 following the sprayed waterproof film layer 5 to form an integral composite structure together with the first concrete spraying layer 4, wherein the integral composite structure and the first concrete spraying layer bear the long-term surrounding rock pressure, and the second concrete spraying layer 6 has the functions of fire prevention, isolation and protection;
s5, cleaning the bottom, leveling, laying the cushion layer 16 and burying the horizontal drainage pipe 19 and the vertical drainage pipe 20;
s6, sequentially molding a lower independent foundation 13, a bottom plate 15, a drainage side ditch 14, a side column 11, a middle column 12, a middle plate 8, a middle beam 9 and a side beam 10 from bottom to top;
and S7, constructing the residual internal structure, and completing the civil construction of the whole subway station.
In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes of the structure, the characteristics and the principle of the utility model which are described in the patent conception of the utility model are included in the protection scope of the patent of the utility model. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.
Claims (6)
1. A novel semi-wrapped full-drainage waterproof subway station comprises a station arch wall lining, a station bottom plate and drainage side ditches arranged at two sides of the station bottom plate, and is characterized in that,
the station arch wall lining is composed of an anchor rod support layer, a capillary drainage plate strip, a first concrete spraying layer, a spraying waterproof film layer and a second concrete spraying layer which are sequentially arranged; wherein: the capillary drainage plate strip is respectively closely attached to the tunnel surrounding rock and the first concrete spraying layer, and the spraying waterproof film layer is respectively closely attached to the first concrete spraying layer and the second concrete spraying layer; the capillary drainage plate belts are arranged at equal intervals along the length direction of the station, the tail ends of two sides of the capillary drainage plate belts are respectively connected with longitudinal drainage blind pipes arranged at the bottoms of side walls at two sides of the subway station, and the two longitudinal drainage blind pipes are both embedded in the first concrete spraying layer and are respectively communicated with a drainage side ditch through a plurality of transverse drain pipes penetrating through the sprayed waterproof thin film layer and the second concrete spraying layer;
a cushion layer is arranged below the station bottom plate, a plurality of drainage longitudinal pipes and a plurality of drainage transverse pipes are embedded in the cushion layer, the drainage transverse pipes are arranged in parallel at equal intervals along the length direction of the station, and the tail ends of the two sides of each drainage transverse pipe are respectively communicated with the drainage side ditches arranged on the two sides of the station bottom plate; the plurality of the vertical drainage pipes are respectively and vertically arranged with the horizontal drainage pipes and are communicated with each other.
2. The novel semi-enclosed full-drainage waterproof subway station as claimed in claim 1, wherein said capillary drainage plate strips are 0.5-0.8m wide and are arranged one at each 6-8m interval in the longitudinal direction of the station.
3. The novel semi-enclosed full-drainage waterproof subway station as claimed in claim 2, wherein said anchor rod support layer is composed of arch system long anchor rods, arch system short anchor rods and side wall local anchor rods arranged inside tunnel surrounding rocks; the length of the long anchor rod of the arch system is 6m, and the length of the short anchor rod of the arch system is 4 m; the uplift resistance of the long anchor rod of the arch system and the uplift resistance of the short anchor rod of the arch system both need to meet the requirement of 100kN of installation load of the escalator and the barrier-free elevator in the station; the long anchor rods of the arch system and the short anchor rods of the arch system are arranged in a plum blossom shape of 2.0m multiplied by 2.0 m.
4. The novel semi-enclosed full-drainage waterproof subway station as claimed in claim 1 or 3, wherein the first concrete sprayed layer is made of synthetic fiber sprayed concrete with thickness of 150-.
5. The novel semi-packaged full-drainage waterproof subway station as claimed in claim 4, wherein said sprayed waterproof film layer has a thickness of 6-10mm, a impermeability rating not less than P12, and a bonding strength between said sprayed layer and said sprayed layer should not be less than 0.8 MPa.
6. The novel semi-packaged full-drainage waterproof subway station as claimed in claim 5, wherein a bearing system consisting of beams, plates and columns is arranged inside the subway station, the bearing system comprises a middle plate, a middle beam, two side beams, a plurality of middle columns and a plurality of side columns, the bottom of each middle column is provided with an independent foundation, and the tops of the plurality of middle columns are connected with the middle beam; the bottom parts of the side posts are respectively inserted into the drainage side ditch low side walls close to one side of the station side wall, and the top parts of the side posts are respectively connected with the side beams; the middle beam and the two side beams are located on the same horizontal plane and jointly support the middle plate through the middle columns and the side columns, a subway station hall layer is arranged above the middle plate, and a subway station platform layer is arranged below the middle plate.
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| CN202122542485.5U CN216198134U (en) | 2021-10-21 | 2021-10-21 | Waterproof novel subway station is led to full row of half package |
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